I'm not sure what UIWebView is, but yes, it's possible. You need only read the HTML into a string variable and write that string into the Text property of your control.
In VB (my apologies, I'm not sure what language you're using), this is how I'd do it:
Imports System.IO
Dim file As String = "MyWebPage.html"
Dim tr As TextReader = File.OpenText(file)
' You can even skip reading the HTML into a string variable...
TextBox1.Text = tr.ReadToEnd
tr.Close
TextBox1 is a multiline textbox where the HTML code for MyWebPage.html will be displayed.
HTH